Sash-pivot.



J. W. YATES.

SASH PIVOT.

APPLICATION HLED JUNE 20. 19l6.

Patented Mar. 6., 1917.

J m/Euro Jbhn van awes- M on 51 JOHN W. YATES, OF NEW YORK, N. Y.

SIASI-I-PIVOT.

Application filed June 20', 1916. Serial No. 104,648.

To all whom it may concern:

Be it known that I, JOHN W. YATns, a citizen of the United States,residing in the city of New York, borough of Manhattan, county and Stateof NewYor-lr, have invented a certain new and usefulSash-Pivot, of'whichthe following is a specification.

This invention is a sash pivot, particularly adapted for use onfireproof windows of warehouses, factories, etc", and embodies, speakinggenerally, means for mounting the sash for pivotal movement, with whichmeans is associated a latch or detent for automatically limiting theopening move ment of the sash to a predescribed angle, where it is heldby suitable means, such as a fusible link. When a fire takesplace inproximity to such window,.the fusible link" melts, and, as the angle ofinclination of the sash, when open, is such that the line of Weight ofsaid sash falls outside ofthe pivotal connection, the disruption of thefusible link releases the sash and allows it to gravitate into closedposition.

The mountings for sashes of this type are 1n the form of two pivots, oneat either slde of the sash. With one of the pivots is asso-.

ciated' the means for normally limiting the movement of the sash to apredetermined angle of inclination, while the other pivot serves purelyas apivot, and generally has no such means'associa'ted therewith, as thesash may bereadily governed from one of its lateral edgesonly. Thepresent invention is directed to the pivot which is associated with themeans for limiting the opening movement of the sash.

The object of this invention is to improve upon sash pivots of thegeneral character described in order to make them-more positive in theiroperation, stronger in construction,

and operable with greater expedition.

In one of its practical forms, the invention embodies a pivot plateadapted to be mounted on'one of the side stiles-of a sash and providedwith an integral, laterally extending pivot pin journaled in astop platefixed on the window frame. The stop plate is provided with two shouldersor steps adapted to be engaged by a latch mounted on the pivot plate,for pivotal movement about an axis extending forwardly of the pivotplate andat an oblique angle to the face of said plate. l/Vith saidlatch cooperates a weight which forces the latch into engagement with Spe'cification of Letter's'latenti the stops of the stop plate inaccordance with the manipulations of'the sash and latch.

Features of the invention, other than those specified, will be. apparentfrom'the hereinafter detaileddescription taken in conjunction with theaccompanying drawing.

In the acompanying drawing, I have illustrated One practical embodimentof the invention, but the construction shown therein only, and

is to be. understood as illustrative, not as defining the limits of theinvention.-

Figure 1' is a fragmental, vertical section through a .window-sashzshowing the preferred form of the present invention in elevation, saidsection being taken in the plane of the line 1 Fig. 2 1s a secti'onalview similar to that shown in Fig; 1, but illustrating the sash in itsnormally open position for ventilation;

Fig. 3 is a section taken on line 3.3 of Fig. 4, showing the sashinthereversed position to which it may be moved for thepurpose of cleaningthe outside of the'sash pane.

Fig. 4; is a front elevation'of the structure as shown in Fig-.1, and

Fig. 5' is a fragmental' perspective of the upper portion of'the sashplate;

Referring to the drawings, Adesignates a pivot plate, which is securedby a plurality of bolts or screws a to the faceof one side stile of awindow-sash B Formed integral with pivot plate A is a horizontal,laterally extending pivot pin C adapted to extend 'into a journal intheform of' a circular hole 0 in a stopplate D positioned at rightangles to pivot plate A; and secure'd'to the window frame by a pluralityof screws cl. By the cooperation betweenjpivot pin' C and the stopplate, the side stile of sash B is mounted for pivotal movement withinthe frame.

At the upper portion of pivot plate A, and near its lateral edge, saidplate is provided with a forwardly extending bracket the forward face (4of which is vertically inclined', as shown Ill! detail in Fig. 5, so asto lie in a plane in obtuse angular relation to the face of window-sashB. Pivoted to'the face a by means of'a rivet, bolt or screw e, isa latchE, shown in the form of a. bellci'a-n-k, one arm ofwhich is providedwith a nosee and the other arm of whichis formed into a weight 6 1 iFormed on the forward edge of stop plate D is a shoulder f, the'upperface of which is Patented'Mar. e, 1917.

1 of-Fi 4', and showing the sash in closed position.

when sash B is in theclosed position shown in Figs. 1 and 4t, weight 6of latch E will maintain nose 0 of said latch in engagement with the adjaccn-t face of stop plate D, and this relation of the parts will remainthe same as long as the sash is in closed position. As the sash isopened, latch E is bodily gyrated, with its nose still in engagementwith said face of plate 1), until the sash has been inclined to theposition in which it is desired to normally maintain the same forventilating purposes, at which time the nose of the latch has advancedto a point opposite the cut-away or recessed portion f of the stepplate. When the latch reaches this position, its nose is no longer inengagement with the stop plate and, because of its weightedarm 0 isrotated into a position within recess 7. In order to preclude the latchfrom overtraveling, the lower portion thereof is formed with a heel 6which, when the nose 6 enters the recess of the stop plate, engages withthe face of said plate to preclude over-travel of the latch. It will bemanifest that, when the nose of the latch is positioned as described, inthe recess of the stop plate, its forward face will come into engagementwith shoulder f and preclude further pivotal movement of the sash.

As an additional precaution against overtravel of the latch, as well asto preclude its travel in the opposite direction to such eX- tent thatit would engage with and dent the metal from which fireproof sashes aregenerally constructed, the back side of the depending arm of the latchis preferably provided with a rib or projection 6 which loosely liesbetween two substantially vertical flanges (4 which extend downwardlyfrom the forwardly extending bracket a and at the lateral edges thereof.The relation between flanges a and projection or rib e is such as toallow of the required pivotal movement of the latch for its properoperati on, but to preclude over-travel of the latch in eitherdirection. Heel 6 is thus relieved of excess strain, and, at the sametime, pivotal movement of the latch in the opposite direction isrestricted to such extent that the weighted portion 6 will not engagewith and dent or scratch the sash.

The pivoting of latch E to oscillate, figuratively speaking, in a planeoblique to the plane of the face of the sash, by positioning its pivotat an obtuse angle to the face of the sash, plays an important part inmaking the present invention superior to any sash pivot heretoforeemployed. When the sash is in closed position, face M, on which thelatch is pivotally mounted, lies, in the preferred construction shown inthe drawing, in a plane at substantially i5 degrees to the vertical,whereas, wl en the sash is inclined to its i 'entilating position shownin Fig. 2, said face is substantially vertical. -Accordingly, when thesash is closed, latch E lies on, and is, literally, supported by, face aso that its weight is not imposed entirely upon pivot e. lilorem'er, thetendency of weighted arm 0 to oscillate the latch is not so great as ifthe latch were pivoted on a horizontal pivot, and, accordingly, the friction between nose 6 and the face of the stop plate, when the sash isopened, will not be so great, with the result that the wearing of thefree of nose 6 is almost entirely obviated. It will. be remembered that,when sash pivots of this type are once installed in a building, they areexpected to withstand the use of a long term of years, and, where thesashes are opened and closed two or more times every day, the wear onthe nose of the latch, while not very much each time, will, after acomparatively short period, he suliicient to impair the maximumefficiency of the latch. Thus, while the face of the stop plate D guidesthe nose of. the latch into engagement with shoulder the weighted arm 6of said latch will not be brought bear with its entire force to swingthe latch into the recessed o-r cut-away portion f until the sash hassubstantially reached its predetermined ventilating inclination, atwhich time pivot 6 will be substantially horizontal and will allow ofthe proper swinging operation.

The mounting of the latch as described results in still another, andvery important, feature, viz., that it allows of the positioning ofshoulder 7 at a maximum distance from pivot G, the making of thisshoulder quite extensive, and also the bringing of said shoulder almostunder the pivotal connection between the latch and the pivot plate, asshown more particularly in Fig. 2. relatively broad expanse of the latchthus lies directly upon the shoulder, when the sash is open asdescribed, and there is an upward thrust on its pivot c, which istransmitted directly to the bracket portion a. of the pivot plate. Theleverage thus afforded by the sash pivot of this invention, forwithstanding the strains occasioned by the sash when in ventilatingposition, is thereby considerably in excess of any of the pivotsheretofore suggested, and greatly increased strength thereby results.

It will, of course, be understood that the window is maintained in itsventilating position by the usual means, generally in the form of achain embodying a fusible link, said fusible link being adapted fordisruption, upon the application of heat, to release the sash and allowof the automatic closing of the sash. lVhen the thereof. The structureof the latch and stop plate D, with which it cooperates, is such that,when the sash is released, upon the disruption of the link, the sashwill automatically gravitate into closed position. It will be of thelatch extends into the recessed or cutaway portion f, will not in theleast inter fere with the closing movement of the sash, since, as shownin Fig. 3, said nose lIS beveled or curved so that, when it comes intoengagement with the upper edge of said recessed portion, it will beforced into a retracted position. The latch cannot fail to operate asdescribed, since the weight of the sash is so greatly in excess of theweight of the latch, and the oblique pivoting of the latch as describedis, moreover, conducive to maximum efficiency in the retractingoperation.

As windmvs of the type with which this invention is adapted for use areoften in very inaccessible positions, which preclude them from beingwashed from the outside, the latch is adapted for movement to allow ofthe reversing of the sash so that it ma be cleaned from the inside ofthe building. It will be manifest that, when the sash is in the positionshown in Fig. 2, with the nose of the latch in engagement with shoulder7", with which it has come into engagement automatically upon theopening of the sash to its ventilating position, it will normallypreclude the further pivotal movement of the sash in an openingdirection. However, the latch may be grasped in the hand and manuallyoperated to withdraw or retract its nose from the recessed portion f andout of engagement With shoulder 7. WVhen this has been accomplished,there is nothing to preclude the further rotation of the sash, so thatit is free to move into the reversed position shown in Fig. 3. Topreclude over-travel of the sash, a projection d is formed on the stopplate, in the path of nose 6, and said stop is so positioned that, afterthe sash has been re versed to a predetermined extent, the nose of thelatch engages with projection cl, which precludes further reversingmovement sash is in reversed position, it may be readily cleaned fromthe inside, and, after the cleaning operation, it may be again rotatedto at which time the latch will automatically assume its operativeposition, shown in Figs. 1 and 4.

Having thus fully described the invention, what I claim as new, anddesire to secure by Letters Patent, is: I

1. A sash pivot embodying a pivot plate, provided witha portion havingan inclined surface, and which pivot plate is adapted to be mounted on asash, a horizontally positioned pivot pin fixed on said pivot plate,

noted that the fact that nose 6 its closed position,

pivot plate, a latch pivoted astop plate adapted to be secured on awindow frame and provided with an aperture into which a pivot pinextends, a shoulder, on the stop plate and a latch pivotally mounted onthe inclined surface of the pivot plate and adapted to engage with theshoulder on the stop plate, whereby said latch is pivoted foroscillation on an axis extending obliquely to the face of the sash onwhich the pivotplate is mounted.

2. A sash pivot embodying a pivot plate, provided with a portion havingan inclined surface, and which pivot plate is adapted to be mounted on asash, a horizontally positioned pivot pin fixed on said pivot plate, astop plate adapted to be secured 011 a wine dow frame and provided withan aperture into which the pivot pin extends, a shoulder on the stopplate and a latch pivotally mounted onthe inclined surface of the pivotplate and adapted to engage with the shoulder on the stop, plate,whereby said latch is pivoted for oscillation on an axis extendingobliquely to the face of the sash 011 which the pivot plate is mounted,said latch V 'being weighted whereby a portion thereof is maintained inengagement with the stop plate during the opening movement of the sashfor the purpose of guiding said latch into engagement with saidshoulder.

3. A sash pivot embodying a, stop plate adapted to be mounted on awindow frame and provided with an aperture, a shoulder on said stopplate, a pivot plate adapted to be mounted on the sash within the windowframe, apivot pin fixed on said pivot plate and extending into theaperture in the stop plate for pivotally mounting the sash relative tothe window frame, a vertically inclined surface at the upper portion ofsaid pivot plate, a latch pivoted to said surface with the axis ofpivotal movement of said latch in oblique relation to the face of thesash, and means for maintaining a portion of the latch in engagementwith the stop plate during the operation of tilting the sash, said meansbeing also operable to shift the latch into cooperative relation withthe shoulder of the stop plate after the sash'has been tilted to apredetermined extent.

4. A sash pivot embodying a stop plate adapted to be mounted on a windowframe and provided with an aperture, ashoulder on said stop plate,-apivot plate adapted to be mounted on the sash within the window frame, apivot pin fixed on said pivot plate and extending into the aperture inthe stop plate for pivotally mounting the sash relative to thewindowframe, a vertically inclined surface at the upper portion ,of saidintermediate its ends to said surface with the axis of pivotal movementof said latch in oblique relation tothe face of the sash, and means,coiiperating with one arm of the latch, for maintaining the other arm inengagement with the stop plate during the operation of tiltinnthe sash,said means being also operable to shift the latch into cooperativerelation with the shoulder of the stop plate after the sash has beentilted to a predetermined extent.

5. A sash pivot embodying a stop plate adapted to be mounted on a windowframe and provided with an aperture, a shoulder on said step plate, apivot plate adapted to be mounted on the sash within the window frame, apivot pin fixed on said pivot plate and extending into the aperture inthe stop plate for pivotally mounting the sash relative to the windowframe, a vertically inclined surface at the upper portion of'said pivotplate, a latch pivoted to said surface with the axis of pivotal movementof said latch in oblique relation to the face of the sash, means formaintaining a portion of the latch in engagement with the stop plateduring the operation of tilting the sash, said means being also operableto shift the latch into cooperative relation with the shoulder of thestop plate after the sash has beentilted to a predetermined extent, andsaid latch being manually shiftable from a position wherein it is inengagement with the shoulder to allow of further pivotal movement of thesash, and means for limiting such further pivotal movement to apredetermined maximum.

6. A sash pivot embodying a stop plate adapted to be mounted on a windowframe and provided with an aperture, a shoulder on said stop plate, apivot plate adapted to be mounted on the sash within the window frame, apivot pin fixed on said pivot plate and extending into the aperture inthe stop plate for pivotally mounting the sash relative to the windowframe, a vertically inclined surface at the upper portion of said pivotplate, a latch pivoted intermediate its ends to said surface with theaxis of pivotal movement of said latch in oblique relation to the faceof the sash, means cooperating with one arm of the latch for maintainingthe other arm in engagement with the stop plate during the operation oftilting the sash, said means being also-operable to shift the latch intocooperative relation with the shoulder of the stop plate after the sashhas been tilted to a predetermined extent, and said latch beingthereafter manually shiftable to a position free from engagement withthe shoulder of the stop plate to allow of the reversal of the sash, anda projection on the stop plate and in the path of the latch for limitingthe reversing movement of the sash.

7. A. sash pivot embodying two plates pivoted together, one of which isadapted to be secured to a window frame and the other to a sash topivot-ally support the same within the frame, a shoulder on the frameplate, and a cooperating latch on the sash plate, the sash plate beingprovided with a portion having an inclined surface to which said latchis pivoted for oscillation on an axis extending obliquely from the faceof the sash.

. S. In a device of the class described, the combination of a latchadapted to be pivotally mounted on an inclined surface on a window sashfor oscillation on an axis ex tending obliquely from the face of thesash, and a shoulder secured to the frame in which the sash is mountedand adapted to engage with. the latch, when the sash has been opened toa predetermined extent, to normally preclude further. movement of thesash in an opening direction.

9. In a device of the class described, the combination of a latchadapted to be pivotally mounted on an inclined surface on a window sashfor oscillation on an axis extending obliquely from the face of thesash, and a shoulder secured to the frame in which the sash is mountedand adapted to engage with the latch, when the sash has been opened to apredetermined extent, to normally preclude further movement of the sashin an opening direction, said latch being manually shiftable fromengagement with the shoulder to allow of the further pivotal movement ofthe window into a reversed position.

10. A sash pivot embodying two plates, one of which is mounted on a sashand the other of which is mounted on a windowframe, said plates beingpivoted together for pivotally mounting the sash within the frame, ashoulder on the frame plate, a cooperating latch pivoted to the sashplate, said latch being weighted to swing into engagement with. theshoulder when the window has been opened a predetermined extent, thelatch being pivoted for oscillation about an axis positioned obliquelyto the face of the sash, and a projection on the latch extending betweentwo limiting projections on the sash platewhereby overtravel of thelatch in either direction is precluded.

In testimony whereof I have signed my name to this specification.

JOHN YATES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

